EP2563721A2 - Système et procédé de dessalement et de traitement d'eau - Google Patents

Système et procédé de dessalement et de traitement d'eau

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Publication number
EP2563721A2
EP2563721A2 EP11746946A EP11746946A EP2563721A2 EP 2563721 A2 EP2563721 A2 EP 2563721A2 EP 11746946 A EP11746946 A EP 11746946A EP 11746946 A EP11746946 A EP 11746946A EP 2563721 A2 EP2563721 A2 EP 2563721A2
Authority
EP
European Patent Office
Prior art keywords
column
calcium
resin
ions
chloride
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11746946A
Other languages
German (de)
English (en)
Other versions
EP2563721A4 (fr
Inventor
Ockert Tobias Van Niekerk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2563721A2 publication Critical patent/EP2563721A2/fr
Publication of EP2563721A4 publication Critical patent/EP2563721A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J39/00—Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
    • B01J49/05—Regeneration or reactivation of ion-exchangers; Apparatus therefor of fixed beds
    • B01J49/08—Regeneration or reactivation of ion-exchangers; Apparatus therefor of fixed beds containing cationic and anionic exchangers in separate beds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
    • B01J49/75—Regeneration or reactivation of ion-exchangers; Apparatus therefor of water softeners
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/101—Sulfur compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/12—Halogens or halogen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08—Seawater, e.g. for desalination
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters

Definitions

  • This invention relates to a water desalination system and method thereof and in particular a process for providing water with a lowered salinity and which produces a useful and recoverable by-product.
  • Water purification is the process of removing undesirable chemicals, materials, and biological contaminants from water from a particular source. The goal is to produce water fit for a specific purpose. Often, the salinity of the water needs to be lowered. Desalination refers to any of several processes that remove excess salt and other minerals from water. More generally, desalination may also refer to the removal of salts and minerals. This can be done by, inter alia, ion exchange.
  • the waste stream must be removed to a dumping site and dumped in terms of environmental legislation. This adds to the costs and may have a negative environmental impact.
  • a method of water desalination which includes the steps of: a) passing water through a cation column which includes a resin loaded with hydrogen ions to absorb on the resin one or more of the group of cations including calcium, magnesium and sodium ions from the water and to displace the hydrogen ions;
  • step b) passing the water from step a) through an anion column which includes a resin loaded with hydroxide ions to absorb on the resin one or more of the group of anions including sulphate and chloride ions from the water and to displace the hydroxide ions to yield desalinated water;
  • a chloride containing feed solution which includes chloride ions bound with a counter-ion which has greater selective adsorption on the resin than the sodium ions, to displace from the resin almost all of the sodium ions and at least some of the other cations absorbed in step a) to leave a resin loaded with the counter-ions and some of the other cations absorbed in step a), and producing a chloride product solution containing most of the sodium and at least some of the other cations absorbed in step a) from the cation column;
  • hydroxide species of step c) to comprise ammonium hydroxide and for step c) to comprise passing an ammonium hydroxide solution through the anion column to displace the chloride and sulphate ions adsorbed on the resin by hydroxide ions and to produce mainly a mixture of ammonium chloride and ammonium sulphate from the anion column.
  • step c) there is further provided for treating the ammonium chloride and ammonium sulphate of step c) with calcium hydroxide to produce a solution containing calcium sulphate, ammonia gas and calcium chloride, of which the calcium sulphate precipitates from the solution, the ammonia gas may be stripped from the solution and redissolved in water to form ammonium hydroxide for use in step c).
  • chloride containing feed solution of step di) to comprise calcium chloride and for feeding the calcium chloride solution from the step above to step di), to displace most of the sodium and some of the other cations adsorbed on the resin with calcium and to produce a chloride product solution containing most of the sodium from the cation column, and for the nitrate mixture or chloride mixture from step dii) to then comprise calcium nitrate and calcium chloride respectively.
  • the nitrate mixture from the cation column from step dii) contain any magnesium for calcium hydroxide to be added to the mixture, allowing the magnesium nitrate to react with the calcium hydroxide to form calcium nitrate in solution and magnesium hydroxide precipitate which is separable from the solution; and further optionally neutralizing the magnesium hydroxide with nitric acid to form magnesium nitrate and water; alternatively neutralizing the magnesium hydroxide with sulphuric acid to form magnesium sulphate and water.
  • the chloride mixture from the cation column from step dii) contain any magnesium for calcium hydroxide to be added to the mixture from the cation column from step dii), allowing the magnesium chloride to react with the calcium hydroxide to form calcium chloride in the solution and magnesium hydroxide precipitate which is separable from the solution ; and further optionally contacting the calcium chloride with sulphuric acid to form calcium sulphate precipitate and hydrochloric acid, of which the latter is preferably passed through the cation column in step dii) again.
  • the chloride containing feed solution of step di) to comprise potassium chloride and for step di) to comprise passing potassium chloride solution through the cation column to displace mainly sodium adsorbed on the resin with potassium, to produce mainly sodium chloride from the cation column, and for step dii) to comprise passing nitric acid through the cation column to displace calcium, magnesium and potassium adsorbed on the resin by hydrogen ions and to produce calcium nitrate, magnesium nitrate and potassium nitrate from the cation column, thereby leaving a hydrogen ion loaded cation column.
  • step di There is also provided for passing the potassium chloride solution through the cation column in step di) in a volume sufficient to displace all the cations on the cation column to produce sodium chloride, magnesium chloride and calcium chloride; and passing nitric acid through the cation column to produce potassium nitrate from the cation column, thereby leaving a hydrogen ion loaded cation column.
  • step c) to comprise passing a sulphuric acid solution, which has a greater selective adsorption on the resin, through the anion column to displace the chloride ions adsorbed on the resin by sulphate ions and to produce mainly hydrochloric acid from the anion column, and thereafter passing an ammonium hydroxide solution through the anion column to displace sulphate ions adsorbed on the resin with hydroxide ions and producing an ammonium sulphate solution from the anion column, thereby leaving a hydroxide ion loaded anion column, and optionally neutralizing the hydrochloric acid by means of calcium carbonate to produce a solution containing carbonic acid and calcium chloride, of which the carbonic acid dissociates mostly into water and carbon dioxide in solution, alternatively for this hydrochloric acid to be neutralized by calcium hydroxide instead of or in addition to calcium carbonate.
  • ammonium sulphate solution from above to be contacted with calcium hydroxide to form calcium sulphate that precipitate from the solution and optionally for the ammonium hydroxide that can be re-used to displace the sulphate ions on the anion column.
  • a method of treatment of water to reduce the pH value of the water which includes the steps of:
  • a method of treatment of water to increase the pH value of the water which includes the steps of:
  • ammonium sulphate solution from above to be contacted with calcium hydroxide to form calcium sulphate that precipitate from the solution and optionally for the ammonium hydroxide to be re-used to displace the sulphate ions on the anion column.
  • the method to include the steps of removing any one or more of the group of compounds including ammonium (NH 4 + ), nitrate (N0 3 " ) and phosphate (P0 4 3 ⁇ ) from source water by absorbing ammonium on the cation exchange resin and absorbing nitrate and phosphate on the anion exchange resin.
  • NH 4 + ammonium
  • N0 3 " nitrate
  • P0 4 3 ⁇ phosphate
  • ammonium sulphate solution produced from the anion column to be utilized as fertilizer, alternatively to be treated with calcium hydroxide to produce calcium sulphate precipitate and an ammonium hydroxide solution, and optionally for the ammonium hydroxide to be fed to the anion column again to displace sulphate ions adsorbed on the resin with hydroxide ions and to produce an ammonium sulphate solution from the anion column.
  • a system for the treatment of water which includes a cation exchange column including a cation exchange resin and an anion exchange column including a resin with an anion exchange resin, each column including an inlet and outlet and being in fluid communication with each other to perform the steps of the abovementioned method of water purification.
  • a further aspect of the invention provides for an additional column containing a cation exchange resin with a selectivity for heavy metals to remove unwanted elements like heavy metals, including without limitation lead (Pb) and cadmium (Cd) to be removed from the source water prior to it entering the cation column, and for the method to include an additional step to pass source water through such a column prior to it entering the cation column.
  • Figure 1 is a diagrammatic representation of the method of treating water according to the invention, showing the passage of water through cation and anion columns;
  • Figure 2 is a diagrammatic representation of ion exchange with a solution, where a cation exchanger containing counter ions A is placed in a solution containing counter ions B (the initial state), resulting in the redistribution of the counter ions by diffusion until equilibrium is attained (the equilibrium state);
  • Figure 3 shows a concentration profile in a series of ion exchange batch tanks
  • Figure 4 is a diagrammatic representation of the displacement of hydrogen ions, as shown in Figure 1 , by calcium, magnesium and sodium ions and an indication of the distribution of the ions in the cation column, and the displacement of hydroxide ions, as shown in Figure 1 , by sulphate and chloride ions and an indication of the distribution of the ions in the anion column;
  • Figure 5 is a diagrammatic representation of a method of treatment of water according to a first embodiment of the invention, showing the regeneration of the anion column with ammonium hydroxide and the cation column with calcium chloride and nitric acid;
  • Figure 6 is a diagrammatic representation of the flow of liquids according to the process as shown in Figure 5;
  • Figure 7 is a diagrammatic representation of a method of treatment of water according to a second embodiment of the invention, showing the regeneration of the anion column with ammonium hydroxide and the cation column with calcium chloride and hydrochloric acid;
  • Figure 8 is a diagrammatic representation of the flow of liquids according to the process as shown in Figure 7;
  • Figure 9 shows an alternative to the regeneration of the anion column by making use of sulphuric acid;
  • Figure 10 is a diagrammatic representation of the flow of liquids according to the process as shown in Figure 9;
  • Figure 1 1 is a diagrammatic representation of a third embodiment of a method of treatment of water according to the invention, in which the cation column is regenerated by means of hydrochloric acid;
  • Figure 12 is a diagrammatic representation of a fourth embodiment of a method of treatment of water according to the invention, in which the cation column is regenerated by means of potassium chloride;
  • Figure 13 is a diagrammatic representation of the method shown in Figure 12 wherein the potassium chloride solution is of an increased volume sufficient to displace all the cations on the cation column;
  • Figure 14 is a diagrammatic representation of the method of the invention by using the cation column only to decrease the pH value of water.
  • Figure 15 is a diagrammatic representation of the method of the invention by using the anion column only to increase the pH value of water.
  • a water desalination process provides for two columns through which source water may be passed.
  • Source water referred to in this specification relates to the water which the user wishes to purify and may include, inter alia, sodium, calcium, magnesium, sulphates and chlorides, and also heavy metals such as lead and cadmium.
  • the processes will be preferably performed in fixed bed columns which allows for significant volumes of water, typically about 8000 litres and more to be passed through the columns per hour.
  • the first column contains a cation exchange resin (R). This will hereinafter be referred to as the cation column.
  • the second column contains an anion exchange resin (FT). This will hereinafter be referred to as the anion column.
  • a water supply line supplies source water to the cation column and from there to the anion column.
  • the cation column includes a resin which is initially loaded with hydrogen (H + ) ions.
  • the anion column includes a resin which is initially loaded with hydroxide ions (OH " ). This is shown in Figure 1 .
  • the ions in the solution that are in contact with the resin have different terms depending on the role they play in the process.
  • the resin is an insoluble substance that consists of a matrix with fixed charges.
  • a cation resin has negative charges and the anion resin has positive charges.
  • each negative charge on the resin has a positive ion or a cation associated with it called a Counter ion.
  • a positive ion or a cation associated with it called a Counter ion.
  • Co-ions When the resin is in contact with a salt solution the other negative ions in the solution is called Co-ions.
  • the resin's selectivity for the hydrogen ions is, apart from lithium, the lowest and to get the resin in the hydrogen or proton form it is necessary to use an excess of acid.
  • an ion exchanger in the A form where A is an arbitrary counter ion, is placed in a solution of an electrolyte BY, counter ions A will migrate from the exchanger into the solution and counter ions B from the solution into the ion exchanger, i.e. an exchange of counter ions take place. After a certain time, ion-exchange equilibrium is attained. Now, both the ion exchanger and the solution contain both counter-ion species A and B.
  • the concentration ratio of the two counter ions is not necessarily the same.
  • the ratio will depend on the selectivity of the resin for a specific counter ion. If the selectivity of the resin is higher for Counter Ion B than for A, the concentration of B will be higher than A on the resin, and the concentration for A will higher than B in the solution.
  • ion exchange processing can be accomplished by either a batch method or a column method. In the batch method, the resin and solution are mixed in a batch tank, the exchange is allowed to come to equilibrium, then the resin is separated from solution. The degree to which the exchange takes place is limited by the preference the resin exhibits for the ion in solution.
  • the passing of the water through the cation column causes Ca 2+ , Mg 2+ or Na + ions in the water to displace the FT ions.
  • Ca 2+ , Mg 2+ or Na + will hereinafter be referred to as M + .
  • the water leaving the cation column contains the FT ion and no or a limited amount of the cations present in the source water.
  • passing the water to the anion column causes the hydroxide ions to be displaced by one or more of the group of anions (X " ) including sulphates (S0 4 2 ⁇ ) and chlorides (CI " ).
  • FT ions react with OH " ions to form water (H 2 0).
  • the water leaving the anion column contains no or a limited amount of ions and is therefore substantially desalinised.
  • the anion resin is then regenerated with ammonium hydroxide to form a mixture of ammonium chloride and/or ammonium sulphate, as shown in Figure 5.
  • the ammonium chloride and ammonium sulphate mixture is then treated with calcium hydroxide that form calcium sulphate that precipitate, ammonia gas that can be stripped from the solution to be re-dissolved and be reused again for the next cycle when the anion resin is regenerated.
  • the third compound that will be formed is calcium chloride.
  • the anion resin (FT) regeneration can be expressed by the following equations:
  • the cation resin is then regenerated, still as shown in Figure 5.
  • the Na + concentrated on the bottom of the cation column is removed by pumping the CaCI 2 (aq) solution just produced as described above through the cation column to produce a sodium chloride (NaCI) solution.
  • the regeneration can then follow one of two alternatives, namely:
  • the cation resin is further regenerated with nitric acid (HN0 3 ) to form a mixture of calcium and magnesium nitrate. (In the reaction below only the reaction related to calcium will be shown.)
  • H 2 S0 4 sulphuric acid
  • the anion exchange resin is then regenerated by passing an ammonium hydroxide (NH 4 OH) solution through the anion column to displace sulphate ions (S0 4 2" ) adsorbed onto the resin with hydroxide ions (OH " ), this will produce an ammonium sulphate ((NH 4 ) 2 S0 4 ) solution from the anion column, thereby leaving an hydroxide ion (OH " ) loaded anion column.
  • Ammonium sulphate ((NH 4 ) 2 S0 4 ) is useful as a fertilizer.. This can be illustrated by the following chemical reactions:
  • R'CI(s) means CI " absorbed onto the resin the anion exchange column.
  • the hydrochloric acid produced from the anion column is then neutralized by means of calcium carbonate (CaC0 3 ) to produce a solution containing carbonic acid (H 2 C0 3 ) and a calcium chloride (CaCI 2 ) solution.
  • CaC0 3 calcium carbonate
  • CaCI 2 calcium chloride
  • the carbonic acid will naturally dissociate to water (H 2 0) and carbon dioxide gas (C0 2 ) whereas the calcium chloride (CaCI 2 (aq)) will remain in solution, and is passed through the cation column to displace mainly sodium (Na + ) concentrated at the bottom of the cation column, to produce mainly sodium chloride (NaCI) from the cation column.
  • the hydrochloric acid may be neutralized by calcium hydroxide (Ca(OH) 2 ) in substantially the same way as described above which will yield calcium chloride and water.
  • the cation exchange resin is regenerated by passing nitric acid (HN0 3 ) through the cation column to displace at least one of calcium and magnesium ions adsorbed onto the resin by hydrogen ions to produce calcium nitrate (Ca(N0 3 ) 2 ) and/or magnesium nitrate (Mg(N0 3 ) 2 ) from the first column. This will leave a cation column loaded with hydrogen ions.
  • HN0 3 nitric acid
  • Mg(N0 3 ) 2 magnesium nitrate
  • the calcium nitrate and magnesium nitrate can be used as a fertilizer. It is however not preferable to have a calcium nitrate and magnesium nitrate mixture in solution and it is desirable to separate them. In order to do so, calcium hydroxide (Ca(OH) 2 ) may be added to the solution. The magnesium nitrate will react with the calcium hydroxide to form more calcium nitrate and magnesium hydroxide (Mg(OH) 2 ), which will precipitate due to its low solubility and can be separated from the solution. This will leave a calcium nitrate solution that can be used as a fertilizer.
  • Ca(OH) 2 calcium hydroxide
  • Mg(OH) 2 calcium nitrate and magnesium hydroxide
  • Figure 10 shows the liquid flows for the process as described with reference to Figure 9.
  • HCI hydrochloric acid
  • HN0 3 nitric acid
  • hydrochloric acid (HCI) generated from the anion column is recovered as it is, and not neutralized to yield calcium chloride (CaCI 2 ) as shown in Figures 9 and 1 1 .
  • This embodiment is useful in situations where there is a market for a mixture of nitrate based fertilizer and where there is a ready and close market for hydrochloric acid.
  • the sodium ions (Na + ) adsorbed onto the resin (refer Fig 4) is replaced with potassium ions (K + ) by passing potassium chloride (KCI) through the cation column, which produces sodium chloride from the cation column and leaves potassium ions on the resin.
  • KCI potassium chloride
  • Nitric acid (HN0 3 ) is then passed through the cation column, to displace the potassium ions (K + ) and the already present calcium ions (Ca 2+ ) and magnesium ions (Mg 2+ ) with hydrogen ions (FT), producing calcium nitrate ((CaN0 3 ) 2 ), magnesium nitrate ((MgN0 3 ) 2 ), and potassium nitrate (KN0 3 ), and a cation column loaded with hydrogen ions ready for the next cycle of water treatment.
  • a fifth embodiment of the invention is shown in Figure 13.
  • KCI potassium chloride
  • a sixth embodiment is shown in Figure 14. In this embodiment only the cation column is used. This is done in instances when the bicarbonate concentration in the water is very high and there is a need for the pH to be reduced without increasing the total dissolved solids "TDS" of the water.
  • This is similar to the cation leg of the third and fourth embodiments shown in Figures 12 and 13, but only the cation column is used.
  • a seventh embodiment of the invention is shown in Figure 15. This is similar to the fifth embodiment shown in Figure 13, but in this instance only the anion column is used. This is done in instances when the pH of the water is too low (and thuds almost acidic), and the water needs to be neutralized without increasing the total dissolved solids "TDS" of the water.
  • unwanted elements may be present in the source water like heavy metals for example lead (Pb) and cadmium (Cd). These unwanted elements may be removed prior to the source water entering the cation column by passing the water first through a column which includes a resin with selectively for these elements.
  • Pb lead
  • Cd cadmium
  • ammonium NH 4 +
  • nitrate N0 3 "
  • phosphate P0 4 3 ⁇
  • ammonium will be absorbed on the cation exchange resin and the nitrate and phosphate will be absorbed on the anion exchange resin.
  • ammonium sulphate (NH 4 ) 2 S0 4 ) and ammonium nitrate (NH 4 N0 3 ).

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

L'invention porte sur des procédés de dessalement d'eau et sur un système pour leur mise en œuvre, qui comprend le traitement d'eau dans des colonnes échangeuses d'ions cationique et anionique et la régénération des colonnes après traitement de l'eau pour les préparer à nouveau à un autre cycle de traitement et également l'utilisation de sous-produits récupérables pendant la régénération des colonnes échangeuses d'ions au lieu d'un rejet.
EP11746946.0A 2010-02-24 2011-02-23 Système et procédé de dessalement et de traitement d'eau Withdrawn EP2563721A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ZA200908330 2010-02-24
ZA201006606 2010-09-15
PCT/IB2011/050740 WO2011104669A2 (fr) 2010-02-24 2011-02-23 Système et procédé de dessalement et de traitement d'eau

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EP2563721A2 true EP2563721A2 (fr) 2013-03-06
EP2563721A4 EP2563721A4 (fr) 2014-07-23

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US (1) US20120318743A1 (fr)
EP (1) EP2563721A4 (fr)
CN (1) CN103068742B (fr)
AU (1) AU2011219469A1 (fr)
WO (1) WO2011104669A2 (fr)
ZA (1) ZA201207190B (fr)

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WO2019154768A1 (fr) * 2018-02-09 2019-08-15 Aquis Wasser-Luft-Systeme Gmbh, Lindau, Zweigniederlassung Rebstein Stabilisation de la dureté de l'eau au moyen d'un échangeur d'anions
CN109824114A (zh) * 2019-03-29 2019-05-31 中国科学院沈阳应用生态研究所 一种设施农业水肥盐输入一体化调控的方法与装置
CN109850992B (zh) * 2019-03-29 2023-09-26 中国科学院沈阳应用生态研究所 防治设施农业土壤次生盐碱化的水肥盐分离子输入一体化调控方法及装置
CN110078282A (zh) * 2019-04-19 2019-08-02 苏州希图环保科技有限公司 一种重金属废水处理工艺
CN112723513B (zh) * 2020-12-14 2022-05-03 石家庄绿洁节能科技有限公司 一种铵盐结晶净化含氯废水的处理工艺
CN112791560A (zh) * 2020-12-28 2021-05-14 山东省水利科学研究院 一种带压气体再生装置及方法
CN112850752A (zh) * 2021-02-08 2021-05-28 贵州荣福龙工程科技有限公司 一种氯化钾与硫酸制硫酸钾联产盐酸的方法和系统
CN115259333B (zh) * 2022-09-02 2024-04-02 西安交通大学 一种用于去除及回收废水中重金属离子的诱晶载体及其制备方法
CN115353249B (zh) * 2022-10-20 2023-02-03 山东金泽水业科技有限公司 二氧化碳固化回收高纯度碳酸氢钠的废水处理工艺

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1464007A (en) * 1974-04-23 1977-02-09 Dynamit Nobel Ag Regeneration of ion exchange resins
WO2007016461A2 (fr) * 2005-07-29 2007-02-08 Grott Gerald J Procedes de purification et d'utilisation d'eau moderement saline, utilises en particulier en aquaculture et en agriculture

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB866856A (en) * 1958-06-14 1961-05-03 Basf Ag Improvements in the production of ballast-free potassium ammonium nitrate
US7717173B2 (en) * 1998-07-06 2010-05-18 Ecycling, LLC Methods of improving oil or gas production with recycled, increased sodium water
CN101257976A (zh) * 2005-07-29 2008-09-03 杰拉尔德·J·格罗特 中度咸水的净化方法及其应用
WO2007046008A1 (fr) 2005-10-17 2007-04-26 Ockert Tobias Van Niekerk Purification d'eau
US20090026141A1 (en) * 2006-02-14 2009-01-29 Darryl Howard Effluent treatment process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1464007A (en) * 1974-04-23 1977-02-09 Dynamit Nobel Ag Regeneration of ion exchange resins
WO2007016461A2 (fr) * 2005-07-29 2007-02-08 Grott Gerald J Procedes de purification et d'utilisation d'eau moderement saline, utilises en particulier en aquaculture et en agriculture

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2011104669A2 *

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US20120318743A1 (en) 2012-12-20
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CN103068742B (zh) 2017-05-03
EP2563721A4 (fr) 2014-07-23
AU2011219469A1 (en) 2012-10-18
WO2011104669A3 (fr) 2013-10-10
WO2011104669A2 (fr) 2011-09-01

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